Simpson Electric 372-3 Ohmmeter

Introduction

The Simpson Electric 372-3 is a handheld ohmmeter designed for dependable resistance measurement in field, workshop, and maintenance environments. With a broad measurement range and straightforward manual adjustment, it is suitable for technicians who need a dedicated instrument for checking electrical resistance.

Part Description

The Simpson Electric Company 372-3 Ohmmeter is a CE-certified handheld instrument with six resistance ranges spanning from 0.2 Ω to 50 MΩ. It provides an accuracy rating of ±3%, supporting measurements from low-resistance connections through high-resistance components and insulation-related checks.

A front-panel zero-ohm adjustment allows users to compensate for test lead resistance before taking low-ohm measurements. The meter includes batteries and alligator clip leads, enabling use directly out of the box. Its construction also offers protection against moisture and particulate exposure, making it appropriate for practical maintenance and service applications.

Applications

• Measuring resistor values during assembly or troubleshooting
• Checking cable, wire, and connector resistance
• Verifying electrical connections and bonded conductors
• Testing switches, relays, and contacts for resistance changes
• Identifying open circuits in wiring harnesses
• Evaluating motor winding resistance
• Checking heating-element resistance
• Performing insulation-related high-resistance measurements
• Inspecting batteries, leads, and test fixtures

Industries

• Electrical maintenance
• Industrial automation
• Manufacturing and assembly
• HVAC service
• Automotive and transportation service
• Telecommunications
• Utilities and power distribution
• Building maintenance
• Electronics repair
• Educational laboratories and technical training

Usage Ideas

1. Wiring Harness Inspection
   Use the 372-3 to compare resistance across conductors in a wiring harness and locate damaged wires, loose terminals, or corroded connections.

2. Motor Maintenance Check
   Measure the resistance of motor windings during preventive maintenance to identify potential winding faults or inconsistent phase readings.

3. Resistor Sorting Station
   Create a bench-top inspection process for verifying resistor values before they are installed in prototypes, repair assemblies, or production equipment.

Conclusion

The Simpson Electric 372-3 Ohmmeter is a practical handheld resistance-measurement instrument for maintenance, troubleshooting, and inspection work. Its six measurement ranges, 0.2 Ω to 50 MΩ coverage, ±3% accuracy, front zero adjustment, and included test accessories make it a useful tool for technicians working with electrical circuits, wiring, components, and equipment.